Green synthesis of graphitic carbon nitride nanodots using sodium chloride template

Yuan, Bo; Zou, Xianshuai; Yan, Tingnan; Fei, Junjie; Chu, Zengyong

doi:10.1007/s11051-016-3415-0

Cited by 17 publications

(8 citation statements)

References 30 publications

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“…No lattice fringes are seen for PB in Figure 4b,w hereas clear fringes are observed for FeOOHi nF igure 4d,s upporting the transformation. The dominant lattice spacingo ft he FeOOH nanocubes is about0 .206 nm, which can be indexed to the (131) lattice plane, [29] and is similar to the spacing of the (422) plane of PB (about 0.207 nm). This similarity can be explained in terms of the template-controlled growth of the crystals.…”

Section: Resultsmentioning

confidence: 78%

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FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O₂ Batteries

Lin

Zhang

Liang

et al. 2019

Chemistry A European J

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Ac ompositeo fF eOOHn anocubes anchored on carbon ribbonsh as been synthesized and used as ac athode material forL i/O 2 batteries. Fe 2 + ion-exchanged resin serves as ap recursor for both FeOOHn anocubes and carbon ribbons, which are formed simultaneously.T he as-prepared FeOOH cubes are proposed to have ac ore-shell structure, with FeOOH as the shell and Prussian blue as the core, based on information from XPS, TEM, and EDS mapping. As ac athode materialf or Li/O 2 batteries, FeOOHd elivers as pecific capacity of 14816 mA hg À1 cathode with ac yclings tability of 67 cycles over 400 h. The high performance is relatedt o the low overpotentialo ft he oxygen reduction/evolution reactiono nF eOOH. The cube structure,t he supporting carbon ribbons,a nd the -OOH moieties all contribute to the low overpotential. The discharge productL i 2 O 2 can be efficiently decomposed in the FeOOHc athode after ac harging process, leading to higherc ycling stability.I ts high activity and stabilitymake FeOOH ag ood candidate for use in non-aqueous Li/O 2 batteries.

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Section: Resultsmentioning

confidence: 78%

“…Indeed, there have been previousr eports of the replacement of CN À ions by OH À anions. [27][28][29] The crystal structures of the as-prepared PB and the FeOOH nanocubes were determined by XRD analysis, as shown in Figure 2. The PB formed at 950 8Ci nt he molten salt was well crystallized.…”

Section: Resultsmentioning

confidence: 99%

FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O₂ Batteries

Lin

Zhang

Liang

et al. 2019

Chemistry A European J

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“…It is worth noting that the obvious stretching vibration peaks at 2290 cm −1 are observed in the Fe−CN‐x samples, which prove the existence of C≡N group [29] . The FTIR results indicate that the iron acetylacetonate promotes the opening of heptazine heterocycles during the polymerization of melamine, thus introducing C≡N group into the sample [30,31] …”

Section: Resultsmentioning

confidence: 87%

Synergy of Iron Doping and Cyano Groups for Enhanced Photocatalytic Hydrogen Production over C₃N₄

Xiao

Zhang

et al. 2021

Chemistry A European J

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Improving the insufficient carrier separation dynamics is still of significance in carbon nitride (C3N4) research. Extensive research has been devoted to improving the carrier separation efficiency through a single strategy, while ignoring the synergistic enhancement effect produced by coupling two or more conventional strategies. Herein, we reported the fabrication of cyano group‐containing Fe‐doped C3N4 porous materials via direct co‐calcination of iron acetylacetonate and melamine for synergistically improving the photocatalytic performance. Iron acetylacetonate can promote the generation of cyano groups and form Fe‐doping in C3N4, thereby increasing the visible‐light absorption and reactive sites. Further, the internal donor‐acceptor system formed by cyano groups and Fe‐doped sites promoted charge carrier separation and inhibited the radiation recombination of e−‐h+ pairs. The optimized photocatalytic activity of Fe−CN‐2 sample was 4.5 times of bulk C3N4 (BCN).

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“…These findings further confirm the TEM and XRD results, suggesting that when more urea is present, more triazine rings can be formed and combined under tris‐s‐triazine rings to form the PCN structures, which are more organized materials. On the contrary, when the urea concentration decreases, less organized structures are formed [ 38,39 ]…”

Section: Resultsmentioning

confidence: 99%

Engineering the Surface Chemistry and Morphology of Polymeric Carbon Nitrides Towards Greener Heterogeneous Catalysts for Biodiesel Synthesis

Medeiros

Macina

Bicalho

et al. 2023

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Biodiesel remains one of the most promising alternatives to replace fossil fuel‐derived petrodiesel. Nonetheless, conventional biodiesel synthesis relies on homogeneous alkali‐based catalysts that involve long and tedious purification steps , increasing biodiesel production costs. Heterogeneous catalysts have emerged as promising alternatives to circumvent these drawbacks, as they can easily be recovered and reused. Herein, polymeric carbon nitride dots and nanosheets are synthesized through a solid‐phase reaction between urea and sodium citrate. Their morphology and surface chemistry are tuned by varying the precursor's ratio, and the materials are investigated as catalysts in the transesterification reaction of canola oil to biodiesel. A conversion of > 98% is achieved using a 5 wt% catalyst loading, oil to methanol ratio of 1:36 at 90 °C for 4 h, with the performance maintained over at least five reuse cycles. In addition, the effect of the transesterification reaction parameters on the reaction kinetics is evaluated, which follows a pseudo‐first‐order (PFO) regime. Combined with a deep understanding of the catalyst's surface, these results have allowed us to propose a reaction mechanism similar to the one observed for homogenous alkali catalysts. These carbon nitride‐based nanoparticles offer a metal‐free and cost‐effective alternative to conventional homogeneous and metal‐based heterogeneous catalysts.

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Green synthesis of graphitic carbon nitride nanodots using sodium chloride template

Cited by 17 publications

References 30 publications

FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O₂ Batteries

FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O₂ Batteries

Synergy of Iron Doping and Cyano Groups for Enhanced Photocatalytic Hydrogen Production over C₃N₄

Engineering the Surface Chemistry and Morphology of Polymeric Carbon Nitrides Towards Greener Heterogeneous Catalysts for Biodiesel Synthesis

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Green synthesis of graphitic carbon nitride nanodots using sodium chloride template

Cited by 17 publications

References 30 publications

FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O2 Batteries

FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O2 Batteries

Synergy of Iron Doping and Cyano Groups for Enhanced Photocatalytic Hydrogen Production over C3N4

Engineering the Surface Chemistry and Morphology of Polymeric Carbon Nitrides Towards Greener Heterogeneous Catalysts for Biodiesel Synthesis

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Product

Resources

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FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O₂ Batteries

FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O₂ Batteries

Synergy of Iron Doping and Cyano Groups for Enhanced Photocatalytic Hydrogen Production over C₃N₄